- how many sets should you do for heavy singles?Depends on the program, what percentage of you 1rm you are doing, etc.

- when going from heavy single to 10 reps, how much kg do you need to decrease the weight, 15 kg, 20 kg?? http://www.bodybuilding.com/fun/other7.htm These calculators aren't perfect, it takes trial and error.

- is doing some sets of heavy singles, then lower the weight and do some sets of 10 reps good for strength and size gainz?Progressive overload and eating in a surplus are more meaningful than doing "strength" or "hypertrophy" rep ranges. Just doing them willy nilly won't help much. Pick a program that incorporates both if that's what you want to do.

Originally Posted by XxSAVAGExsome important questions I need answer to:

- heavy singles vs heavy doubles vs heavy triples. whats best for strength? Doing a mix of them. Pick a program that uses different rep ranges strategically.
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- how many sets should you do for heavy singles?Depends on the program, what percentage of you 1rm you are doing, etc.

- when going from heavy single to 10 reps, how much kg do you need to decrease the weight, 15 kg, 20 kg?? http://www.bodybuilding.com/fun/other7.htm These calculators aren't perfect, it takes trial and error.

- is doing some sets of heavy singles, then lower the weight and do some sets of 10 reps good for strength and size gainz?Progressive overload and eating in a surplus are more meaningful than doing "strength" or "hypertrophy" rep ranges. Just doing them willy nilly won't help much. Pick a program that incorporates both if that's what you want to do.